Added in GCC 1.27 aka first i386 version of GCC

Straight from 1988! It'll even compile DooM! I'll have to tweek the other test stuff, and I also added my C port of Tradewars. Other stuff in the works, as always.

So it's the same filename to download, as I just replaced the other one. And a new git repository for GCC 1.27.

Now that I know it's basically 4.3 BSD a.out / i386 I geuss I can try much later versions of GCC.